Camera module with anti-shake and focusing functions

Abstract

The present invention discloses a camera module with an anti-shake and focusing function, which includes a camera component, an image sensor, a flexible circuit board, and a three-axis translation motor. Among them, the three-axis translation motor includes a fixed part, a movable part, and at least three driving mechanisms. The movable part is movably arranged outside the fixed part and is used to install the image sensor or the lens assembly. Each driving mechanism is respectively installed on at least three sides of the fixed part, and each driving mechanism is respectively used to drive the movable part to translate along the X-axis, Y-axis, or Z-axis. When the movable part moves, it drives the image sensor or the lens assembly to translate synchronously, thereby enabling the camera module to achieve both the anti-shake function and the autofocus function at the same time. The camera module of the present invention reduces the number of drivers, thereby simplifying the overall structure, occupying less space, being beneficial to the miniaturization of the overall structure of the camera module, and at the same time reducing the production cost of the camera module.

Description

Technical Field

[0001] The present invention relates to the technical field of cameras, and particularly to a camera module capable of simultaneously implementing anti-shake and focusing functions. Background Art

[0002] Optical image stabilization technology detects minute movements of the lens through a gyroscope inside the lens, transmits the signal to the microprocessor to calculate the displacement amount to be compensated, and then the microprocessor controls the movement of the lens or the image sensor according to the shaking direction and displacement amount for compensation, thereby overcoming the problem of unclear images caused by lens shaking to the greatest extent.

[0003] The existing optical image stabilization technologies mainly have the following two methods: First, lens mobile optical image stabilization; second, image sensor (CCD / CMOS, etc.) mobile optical image stabilization. In both of the above methods, an autofocus actuator is set to drive the lens or the image sensor to move up and down in the optical axis direction to achieve the autofocus function; in addition, an optical image stabilization actuator is set to drive the lens or the image sensor to move or deflect in two directions perpendicular to the optical axis, thereby compensating for the movement or deflection of the lens in the direction perpendicular to the optical axis, and thus achieving the optical image stabilization function.

[0004] That is to say, in the existing optical image stabilization technologies, the autofocus function and the anti-shake function are respectively achieved by driving with an optical image stabilization actuator and an autofocus actuator. Therefore, the assembly process of the micro optical image stabilization camera module is difficult, the structure is complex, it cannot meet the requirements of product miniaturization, and multiple actuators result in a relatively high overall cost.

[0005] Therefore, it is necessary to provide a camera module with a simple structure, small occupied space, and lower cost to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a camera module with anti-shake and focusing functions, which has a simple structure, small occupied space, and lower cost.

[0007] To achieve the above purpose, the technical solution of the present invention is: to provide a camera module with anti-shake and focusing functions, which includes a camera component, an image sensor, a flexible circuit board, and a three-axis translation motor. Among them, the three-axis translation motor includes a fixed part, a movable part, and at least three driving mechanisms. The camera component or the image sensor is fixed outside the movable part, the flexible circuit board is fixed outside the movable part and is electrically connected to the camera component or the image sensor. Each of the driving mechanisms is respectively installed on at least three side surfaces of the fixed part, and each of the driving mechanisms is respectively used to drive the movable part to translate along the X-axis, Y-axis, or Z-axis. When the movable part moves, it drives the image sensor or the lens component to translate synchronously.

[0008] Preferably, the driving mechanism has three or six driving mechanisms. The three driving mechanisms are respectively installed on three sides of the fixing member, and the moving member is respectively driven by the three driving mechanisms to translate along the X-axis, Y-axis or Z-axis; the six driving mechanisms are respectively installed on six sides of the fixing member, and are symmetrically arranged in pairs along the X-axis, Y-axis or Z-axis, and the moving member is driven by the six driving mechanisms to move along the X-axis, Y-axis or Z-axis respectively.

[0009] Preferably, the three-axis translation motor further includes at least one elastic member. The elastic member is respectively connected to the moving member and the fixing member. The elastic member can be deformed along the X-axis, Y-axis or Z-axis respectively. When any driving mechanism drives the moving member to move, the elastic member can be deformed, and when the elastic member resumes deformation, it drives the moving member to reset.

[0010] Preferably, each of the driving mechanisms includes:

[0011] A driving arm, the driving arm includes a fixed portion, a deformation portion and a driving portion arranged in sequence. The fixed portion is fixed to the fixing member, and the deformation portion can generate elastic deformation;

[0012] A driving member, the driving member is connected to the driving portion. When the driving member applies force to the driving portion, the deformation portion can be deformed, so that the driving portion generates displacement and acts on the moving member to push the moving member to move.

[0013] Preferably, the thickness of the deformation portion is less than the thickness of the driving portion.

[0014] Preferably, the driving member is an SMA wire. One end of the SMA wire is connected to the driving portion. When the SMA wire is energized and shrinks, it can apply force to the driving portion, and then the deformation portion can be deformed. When the SMA wire is de-energized and relaxed, the deformation portion can resume deformation.

[0015] Preferably, each of the driving mechanisms further includes a push block, and the push block is connected to the driving portion and is detachably abutted against the moving member.

[0016] Preferably, the elastic member includes a first connecting portion, a second connecting portion arranged at intervals, and at least one elastic arm connected between the two. Each elastic arm can be deformed along the X-axis, Y-axis or Z-axis. One of the first connecting portion and the second connecting portion is fixed to the moving member, and the other of the first connecting portion and the second connecting portion is connected to the fixing member. When the moving member moves in any direction, the elastic arm can be deformed.

[0017] Preferably, the three-axis translation motor further includes a housing. The fixing member and the moving member are both accommodated in the housing. The fixing member is provided with a fixing block protruding upward. A through hole corresponding to the fixing block is formed in the moving member. The fixing block passes through the through hole and is fixed to the inner wall of the housing, so that the moving member is movably accommodated between the housing and the fixing member.

[0018] Preferably, the flexible circuit board includes a plurality of side plates that are sequentially connected and bent with respect to each other, and a bottom plate connected to the bottom of one of the side plates. A receiving space is defined among the plurality of side plates and the bottom plate. The moving member is accommodated in the receiving space and connected to one of the side plates.

[0019] Compared with the prior art, since the camera module with anti-shake and focusing functions of the present invention, its three-axis translation motor includes a fixing member, a moving member and at least three driving mechanisms. The moving member is movably disposed outside the fixing member and is used for mounting an image sensor or a camera assembly. Each driving mechanism is respectively mounted on at least three side surfaces of the fixing member and is respectively used for driving the moving member to move along the X-axis, Y-axis or Z-axis. By moving the moving member in three directions, the image sensor or the camera assembly is driven to move synchronously along the X-axis, Y-axis or Z-axis, thereby realizing the anti-shake function and the auto-focus function of the image sensor or the camera assembly. That is, by using one three-axis translation motor, the camera module can simultaneously realize the focusing function and the anti-shake function. Compared with the prior art, the number of drivers is reduced, thereby simplifying the overall structure of the camera module, making the space occupied by the camera module smaller, facilitating the miniaturization of the overall structure of the camera module, reducing the assembly difficulty of the camera module, and at the same time reducing the production cost of the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the camera module of the present invention.

[0021] Figure 2 is Figure 1 a schematic structural diagram of the housing removed.

[0022] Figure 3 is Figure 1 an exploded view of

[0023] Figure 4 is Figure 3 a further exploded view.

[0024] Figure 5 is Figure 4 a schematic structural diagram of the moving member, the fixing member and the driving mechanism in

[0025] Figure 6 is Figure 5Schematic top view of the middle fixing member and the driving mechanism.

[0026] Figure 7 is Figure 6 Schematic bottom view of

[0027] Figure 8 is Figure 6 Front view of

[0028] Figure 9 is Figure 6 Side view of

[0029] Figure 10 is Figure 4 Exploded view of the movable member in

[0030] Figure 11 is Figure 4 Schematic structure view of the middle fixing member in

[0031] Figure 12 Front view of a driving mechanism in the present invention.

[0032] Figure 13 Schematic three - dimensional structure view of a driving mechanism in the present invention.

[0033] Figure 14 is Figure 13 Exploded view of a driving arm in

[0034] Figure 15 is Figure 10 Exploded view of a side wall of the movable member and an elastic member in

[0035] Figure 16 is Figure 4 Schematic structure view of the flexible circuit board in Detailed implementation manners

[0036] Now, embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals represent like elements. It should be noted that the orientation descriptions involved in the present invention, such as up, down, left, right, front, back, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the technical solutions of the present application or / and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present application. The first, second, etc. described are only used to distinguish technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0037] Combined with Figures 1 - 16As shown in the figure, the three-axis translation motor 100 provided by the present invention is mainly applicable to a periscope camera module, and is used to drive an image sensor 200 or a camera assembly (not shown in the figure) to translate in the X-axis, Y-axis, and Z-axis directions respectively, so as to simultaneously realize the autofocus and anti-shake functions of the camera module. It can be understood that the three-axis translation motor 100 is not limited to being used in a periscope camera module, and of course it can also be used in other types of camera modules.

[0038] Continuing to refer to Figures 1 - 16 As shown in the figure, a camera module 1 with anti-shake and autofocus functions provided by the present invention includes a three-axis translation motor 100, an image sensor 200, a flexible printed circuit board (Flexible Printed Circuit board, abbreviated as FPC) 300, and a camera assembly (not shown in the figure). Among them, the image sensor 200 and the flexible printed circuit board 300 are respectively fixed on the outside of the three-axis translation motor 100 and are electrically connected to each other. The flexible printed circuit board 300 is used to supply power to the image sensor 200 and the entire three-axis translation motor 100; the image sensor 200 is arranged at the bottom of the camera assembly or other positions where the image signal transmitted by the camera assembly can be received. The structures and installation methods of the image sensor 200 and the camera assembly are all conventional methods in the art, so they will not be described in detail here. The three-axis translation motor 100 of the present invention can drive the image sensor 200 to translate along the X-axis, Y-axis, or Z-axis. Among them, the anti-shake function of the camera module 1 is realized by the translation of the image sensor 200 along the X-axis or Z-axis, and the autofocus function of the camera module 1 is realized by the translation of the image sensor 200 along the Y-axis. Therefore, the present invention can enable the camera module 1 to simultaneously realize the autofocus and anti-shake functions only through one three-axis translation motor 100, reducing the number of driving mechanisms compared with the existing method, thereby simplifying the overall structure of the camera module 1, reducing the space occupied by the camera module 1, facilitating the miniaturization of the overall structure of the camera module 1, and at the same time reducing the production cost of the camera module 1.

[0039] It can be understood that the camera assembly can also be installed on the three-axis translation motor 100, and the three-axis translation motor 100 drives the camera assembly to translate along the X-axis, Y-axis, or Z-axis, and the autofocus and anti-shake functions can also be realized simultaneously.

[0040] Next, referring to Figures 1 - 15 As shown in the figure, the specific structure and working principle of the three-axis translation motor 100 of the present invention will be described in detail.

[0041] Referring to Figures 3 - 9As shown, in the present invention, the three-axis translation motor 100 includes a fixed member 110, a movable member 120, and at least three driving mechanisms 130. Among them, the movable member 120 is movably disposed outside the fixed member 110, and the image sensor 200 and the flexible circuit board 300 are respectively fixed to the outside of the movable member 120 and electrically connected to each other. Each driving mechanism 130 is respectively installed on at least three sides of the fixed member 110, and each driving mechanism 130 is respectively used to drive the movable member 120 to translate along the X-axis, Y-axis or Z-axis. When the movable member 120 moves, it drives the image sensor 200 and the flexible circuit board 300 fixed to its outside to move synchronously, thereby realizing the translation of the image sensor 200 in the X-axis, Y-axis or Z-axis direction, and thus realizing the functions of autofocus and anti-shake.

[0042] Furthermore, the three-axis translation motor 100 further includes at least one elastic member 140. The elastic member 140 is respectively connected to the movable member 120 and the fixed member 110, and the elastic member 140 can be deformed along the X-axis, Y-axis or Z-axis respectively. Therefore, when the movable member 120 moves, it can cause the elastic member 140 to deform, and the elastic member 140 is used to realize the reset function of the movable member 120.

[0043] The following is combined with Figures 1 - 16 As shown, in an embodiment of the present invention, the driving mechanism 130 is used to drive the movable member 120 to move in three directions respectively to realize the translation of the image sensor 200 in three directions, and at the same time, the elastic member 140 is used to realize the reset of the movable member 120. Specifically, the three-axis translation motor 100 is provided with three driving mechanisms 130 and at least one elastic member 140. The three driving mechanisms 130 are respectively installed on three sides of the fixed member 110, and the three driving mechanisms 130 can respectively act on the inner wall of the movable member 120 to drive the movable member 120 to move along the X-axis, Y-axis and Z-axis respectively. The elastic member 140 is respectively connected to the movable member 120 and the fixed member 110, and the elastic member 140 can be deformed along the X-axis, Y-axis or Z-axis respectively. Therefore, when any one of the driving mechanisms 130 drives the movable member 120 to move, it can cause the elastic member 140 to deform, and when the elastic member 140 restores deformation, it can drive the movable member 120 to reset.

[0044] Specifically combined with Figures 3 - 9As shown, in another embodiment of the present invention, the movable member 120 is directly driven by the driving mechanism 130 to move and reset in three directions. Specifically, the three-axis translation motor 100 is provided with six driving mechanisms 130, and the six driving mechanisms 130 are respectively installed on six side surfaces of the fixing member 110 and are symmetrically installed in pairs. The two symmetrically installed driving mechanisms 130 can respectively drive the movable member 120 to reciprocate in one direction. That is, the three pairs of driving mechanisms 130 can respectively drive the movable member 120 to reciprocate along the X-axis, Y-axis or Z-axis. Thus, the movable member 120 is driven by the six driving mechanisms 130 to achieve translation and reset along the X-axis, Y-axis or Z-axis directions. In this embodiment, a reset member may not be provided additionally.

[0045] More preferably, in this embodiment, the three-axis translation motor 100 may of course also be provided with at least one elastic member 140. The elastic members 140 are respectively connected to the movable member 120 and the fixing member 110, and the elastic members 140 can be deformed along the X-axis, Y-axis or Z-axis respectively. When the movable member 120 moves, it can drive the elastic members 140 to deform. Therefore, the elastic members 140 are used to enhance the reset function of the movable member 120 and shorten the reset time of the movable member 120.

[0046] Next, refer to Figures 4 - 9 As shown, in a more specific embodiment of the present invention, the three-axis translation motor 100 is provided with six driving mechanisms 130 and two elastic members 140. Among them, the six driving mechanisms 130 are respectively installed on six side surfaces of the fixing member 110, and the driving mechanisms 130 installed on two opposite side surfaces of the fixing member 110 are symmetrically arranged. Therefore, the two symmetrically arranged driving mechanisms 130 can drive the movable member 120 to reciprocate along the X-axis, Y-axis or Z-axis. The two elastic members 140 are preferably installed on two opposite side surfaces of the movable member 120, and each elastic member 140 is connected to the movable member 120 and the fixing member 110 to strengthen the reset function of the movable member 120 through the two elastic members 140. Of course, the number and position of the elastic members 140 are not limited thereto. Only one or more elastic members 140 may be provided, and the elastic members 140 may also be installed on any side surface of the movable member 120.

[0047] Continue to combine Figures 1 - 5 、 Figure 10 As shown, in this specific embodiment, the three-axis translation motor 100 further includes a housing 150 with a hollow structure. One side surface of the housing 150 has an opening 151, and a through hole 152 is provided at a position near the bottom plate on another side surface of the housing 150, as Figure 4As shown. The fixing member 110 and the movable member 120 are both accommodated in the housing 150, and the fixing member 110 protrudes outside the movable member 120 and is fixed to the housing 150. That is, the movable member 120 is movably provided between the housing 150 and the fixing member 110. The driving mechanism 130 acts on the inner wall of the movable member 120 to push the movable member 120 to move within the housing 150. At the same time, one end of the movable member 120 protrudes outside the housing 150 through the aforementioned opening 151, and the image sensor 200 is installed on one side surface of the movable member 120 that protrudes outside the housing 150, such as Figure 1 As shown, one end of the flexible circuit board 300 is fixed to the image sensor 200, and the other end of the flexible circuit board 300 protrudes outside the housing 150 through the aforementioned through hole 152 for electrically connecting an external power supply component, such as Figures 1 - 2 As shown.

[0048] More specifically, at least one side surface of the fixing member 110 is convexly provided with a fixing block 111. A through hole 121 corresponding to the fixing block 111 is formed on the movable member 120. The fixing block 111 passes through the through hole 121 and is fixed to the inner wall of the housing 150, and there is a gap between the fixing block 111 and the through hole 121 to ensure that the movable member 120 can move.

[0049] Combined with Figures 4 - 10 As shown, in this specific embodiment, the top surface 110a and the bottom surface 110b of the fixing member 110 are respectively convexly provided with fixing blocks 111. The number of the fixing blocks 111 is not specifically limited herein, and the fixing blocks 111 protrude upward and downward from the fixing member 110 respectively. Correspondingly, through holes 121 corresponding to the fixing blocks 111 are formed on the top wall 120a and the bottom wall 120b of the movable member 120, and the inner diameter of the through hole 121 is larger than the outer diameter of the fixing block 111. The fixing member 110 is accommodated in the movable member 120, and the fixing blocks 111 thereon pass through the through holes 121 and are fixed to the top wall and the bottom wall of the housing 150.

[0050] Specifically referring to Figures 4 - 9 As shown, there are four side surfaces 110c - 110f between the top surface 110a and the bottom surface 110b of the fixing member 110. Connecting blocks 112 are convexly provided on two opposite side surfaces, and the two connecting blocks 112 protrude in opposite directions. The connecting blocks 112 are used for installing elastic members 140 (details will be described later). In this specific embodiment, the side surfaces 110c and 110d of the fixing member 110 are oppositely arranged in the Y-axis direction, such as Figure 4 、 Figure 7 、 Figure 9 As shown, the side surfaces 110e and 110f are oppositely arranged in the X-axis direction, such as Figure 4 、 Figures 8 - 9As shown, the side surfaces 110c and 110d are respectively provided with connecting blocks 112, and the side surfaces of the connecting blocks 112 are roughly I-shaped. Therefore, a receiving groove is formed in the middle of the connecting block 112, and the driving mechanism 130 is partially received in the receiving groove when it is installed on the side surfaces 110c and 110d of the fixing member 110, as shown in FIG. Figure 9 Of course, the shape of the connection block 112 is not limited to that in this embodiment, and it can be set to any other shape as long as it can meet the installation requirements of the elastic member 140. For example, it is also feasible to set only one protrusion in the approximate middle of the side surface.

[0051] Combination Figures 1 - 9 , Figure 11 As shown, in the above-mentioned specific embodiment of the present invention, six driving mechanisms 130 are respectively installed on the top surface 110a, the bottom surface 110b and the four side surfaces 110c~110f of the fixed part 110, and the driving mechanisms 130 installed on the top surface 110a and the bottom surface 110b are symmetrically arranged in the Z-axis direction, and are respectively used to drive the movable part 120 to reciprocate along the Z-axis; the driving mechanisms 130 installed on the side surfaces 110c and 110d are symmetrically arranged in the Y-axis direction, and are respectively used to drive the movable part 120 to reciprocate along the Y-axis; the driving mechanisms 130 installed on the side surfaces 110e and 110f are symmetrically arranged in the X-axis direction, and are respectively used to drive the movable part 120 to reciprocate along the X-axis.

[0052] See below Figures 12 - 14 As shown, in the above specific implementation of the present invention, the six driving mechanisms 130 have the same structure, and the specific structure of one of them is described in detail below by taking it as an example.

[0053] Specifically, the driving mechanism 130 includes a driving member 131 and a driving arm 132. The driving arm 132 has at least one end, one end of the driving arm 132 is fixed to a side surface of the fixed member 110, and the other end of the driving arm 132 is connected to the driving member 131, and the driving arm 132 can generate elastic deformation. When the driving arm 132 is subjected to the force of the driving member 131, it can be deformed, so that the end of the driving member 131 connected to the driving member 131 is displaced and acts on the movable member 120 to push the movable member 120 to move.

[0054] In this specific embodiment, the driving mechanism 130 has two driving arms 132, and the two driving arms 132 are symmetrically fixed to one side of the fixing member 110 in the X-axis direction or the Y-axis direction. Taking the driving mechanism 130 mounted on the side surface 110e of the fixing member 110 as an example, its two driving arms 132 are symmetrically fixed to the side surface 110e in the Y-axis direction, that is, the two driving arms 132 are symmetrically arranged on both sides of a center line extending in the longitudinal direction (Z-axis direction), and the closer ends of the two driving arms 132 are respectively fixed to the fixing member 110, and the farther ends of the two driving arms 132 respectively form a first end and a second end. That is to say, the two driving arms 132 are fixed to the approximate middle position of the side surface 110e, and the positions of the two driving arms 132 at both ends of the side surface 110e form the first end and the second end. The two ends of the driving member 131 are respectively connected to the first end and the second end. The driving member 131 can apply force to the first end and the second end to cause displacement of the first end and the second end, and act on the movable member 120 through the first end and the second end to push the movable member 120 to move, so that the force received by the movable member 120 can be more balanced, and thus the movable member 120 is more stable when translating. It can be understood that only one driving arm 132 can also be provided, or the closer ends of the two driving arms 132 described above are fixed or formed into one body, so that the two driving arms 132 form an integral structure, which does not affect the realization of its function.

[0055] See Figure 12 As shown, the driving arm 132 includes a fixed portion 1321, a deformation portion 1322, and a driving portion 1323 arranged in sequence. The deformation portion 1322 can generate elastic deformation. The fixed portion 1321 is fixed to the side surface 110c of the fixing member 110. A connecting piece 1324 protrudes from one end of the driving portion 1323 away from the fixed portion 1321. The driving member 131 is connected to the connecting piece 1324. Therefore, the end of the driving portion 1323 with the connecting piece 1324 forms the aforementioned first end or second end. The driving member 131 is connected to the connecting piece 1324. When the driving member 131 applies force to the connecting piece 1324, the deformation portion 1322 can be deformed, so that the driving portion 1323 generates displacement and acts on the movable member 120 to push the movable member 120 to move.

[0056] In this specific embodiment, both the fixed portion 1321 and the driving portion 1323 are rigid regions and can hardly generate deformation. The thickness of the deformation portion 1322 is smaller than the thickness of the driving portion 1323, so that the deformation portion 1322 can generate elastic deformation, and a flexible hinge is formed between the fixed portion 1321 and the driving portion 1323 through the deformation portion 1322. Further, through holes or the like can be opened in the deformation portion 1322 to make the deformation amount of the deformation portion 1322 larger. Of course, it is not limited to making the deformation portion 1322 have deformation by reducing the thickness of the deformation portion 1322, and other methods can also be used to realize the deformation.

[0057] More preferably, the driving part 1323 can be set in a bent or curved shape, and the first end or the second end formed thereon protrudes away from the fixing part 110, that is, the first end or the second end protrudes towards the movable part 120, so that the driving arm 132 can act on the movable part 120 with the first end or the second end under a small deformation.

[0058] Combined again with 12- Figure 14 As shown, in the present invention, the driving member 131 is an SMA wire. The two ends of the SMA wire are respectively connected to the connecting pieces 1324 of the two driving arms 132, and the SMA wire is electrically connected to a power supply component (not shown in the figure). When the SMA wire is electrified and shrinks, it can drive the deformation parts 1322 of the two driving arms 132 to generate deformation, and then drive one end of the two driving arms 132 with the connecting pieces 1324 to move away from the fixing part 110, that is, drive the first ends and the second ends of the two driving arms 132 to move away from the fixing part 110. By simultaneously pushing the movable part 120 with the first end and the second end, the movable part 120 is moved in the positive X-axis direction. The first ends and the second ends of the two driving arms 132 act on both ends of one side of the movable part 120 at the same time, so that the force on the movable part 120 is more balanced, thus ensuring the smoothness of the translation of the movable part 120, that is, ensuring the smoother movement of the image sensor 200.

[0059] Next, refer to 12- Figure 14 As shown, in the present specific embodiment, the driving mechanism 130 further includes a pushing block 133. The pushing block 133 is preferably integrally formed by an insulating material. The pushing block 133 is fixed to the driving part 1323 and is located above the aforementioned connecting piece 1324, and the pushing block 133 protrudes towards the movable part 120. When the driving arm 132 deforms and moves, the pushing block 133 is detachably abutted against the movable part 120, that is, when the driving arm 132 moves, the movable part 120 is pushed to move through the pushing block 133. During the process of the pushing block 133 coming into contact with the movable part 120, it plays a role in resisting friction and reducing the friction coefficient.

[0060] More preferably, a card slot 1331 is integrally formed on the pushing block 133. The width of the card slot 1331 is preferably less than or equal to the thickness of the driving part 1323. The pushing block 133 is connected to the driving part 1323 by engaging the card slot 1331 thereon, making the installation of the pushing block 133 more convenient. Of course, the pushing block 133 is not limited to this installation method. For example, it can be directly pasted or fixed to the driving part 1323 by other means.

[0061] Continue to refer to 12- Figure 14As shown, in the present invention, the fixing portion 1321, the deformation portion 1322, and the driving portion 1323 of the driving arm 132 can be formed into an integral structure, or can be formed separately and then fixed together.

[0062] As Figures 13 - 14 shown, in the above specific embodiment, the driving arm 132 is composed of a fixed metal plate 132a and a bow-shaped plate 132b. Among them, the metal plate 132a has a smaller thickness so that it can produce elastic deformation, and a through hole is opened in the approximate middle of the metal plate 132a to enhance its deformation amount; the area of the metal plate 132a with the through hole forms the deformation portion 1322, and the area of the metal plate 132a on one side of the through hole forms the fixing portion 1321. As Figure 12 shown, the area on the other side of the through hole is fixed to one end of the bow-shaped plate 132b, and the aforementioned connecting piece 1324 is provided at the end of the bow-shaped plate 132b away from the metal plate 132a.

[0063] More specifically, the bow-shaped plate 132b is bent, and it includes a first section 1325 fixed to the metal plate 132a, a bent section 1326 extending from the first section 1325 to the side away from the metal plate 132a, and a second section 1327 extending from the bent section 1326 to the side away from the metal plate 132a. Moreover, the first section 1325 and the second section 1327 are arranged in parallel. A downwardly protruding connecting piece 1324 is provided at the end of the second section 1327, and the end of the second section 1327 engages with the aforementioned push block 133. When the driving arm 132 is fixed to the side surface 110c, the second section 1327 is away from the side surface 110c and protrudes toward the movable member 120. Refer to Figure 6 shown. Therefore, the metal plate 132a can make the push block 133 act on the movable member 120 under a small deformation.

[0064] Next, refer to Figure 6 and Figure 9 shown. For the driving mechanism 130 installed on the side surface 110f of the fixing member 110, its structure is the same as that installed on the side surface 110e above, and is symmetrically arranged with the driving mechanism 130 on the side surface 110e. Therefore, its structure will not be described repeatedly. When the driving mechanism 130 on the side surface 110f works, its driving member 131 (SMA wire) is electrified and shrinks, driving the deformation portions 1322 of the two driving arms 132 to generate deformation. Furthermore, it drives the ends of the two driving arms 132 with the connecting pieces 1324 to move in the direction away from the fixing member 110, that is, drives the first ends and the second ends of the two driving arms 132 to move in the negative X-axis direction. By simultaneously pushing the movable member 120 with the first end and the second end, the movable member 120 is moved in the negative X-axis direction.

[0065] Next, in combination with Figures 6 - 9As shown, the structure of the driving mechanism 130 disposed on the side 110c, 110d is as described above, and will not be described again. It should be additionally explained that, since the side 110c, 110d is provided with an I-shaped connecting block 112, therefore, for the driving mechanism 130 installed on the side 110c, the fixing portion 1321 and the deforming portion 1322 of each driving arm 132 are both accommodated in the aforementioned accommodating groove, as shown in FIG. Figure 9 As shown, the driving part 1323 protrudes along the X-axis. Therefore, when the driving member 131 (SMA wire) is energized and contracts to drive the deformation parts 1322 of the two driving arms 132 to deform, the ends of the two driving arms 132 with the connecting pieces 1324 will be driven to move in the positive direction along the Y-axis, that is, the first end and the second end of the two driving arms 132 will be driven to move in the positive direction of the Y-axis, thereby pushing the movable member 120 to move in the positive direction of the Y-axis. Correspondingly, for the driving mechanism 130 installed on the side 110d, the movable member 120 is pushed to move in the negative direction of the Y-axis.

[0066] Combination Figures 6 - 7 As shown, the driving mechanism 130 installed on the top surface 110a is arranged along the X axis as a whole, and it is also feasible to arrange it along the Y axis as a whole; when the driving member 131 (SMA wire) is energized and contracted to drive the deformation parts 1322 of the two driving arms 132 to deform, the first end and the second end of the two driving arms 132 are driven to move in the positive direction of the Z axis, thereby pushing the movable member 120 to move in the positive direction of the Z axis. Correspondingly, the driving mechanism 130 installed on the bottom surface 110b is arranged vertically symmetrically with respect to the driving mechanism 130 on the top surface 110a, and is used to push the movable member 120 to move in the negative direction of the Z axis.

[0067] Combine the following Figures 3 - 5 , Figure 10 , Figure 15 As shown, in the above specific embodiment of the present invention, two elastic members 140 are respectively fixed to the connection block 112 of the fixed member 110, and both are also respectively connected to the movable member 120. More specifically, the side walls 120c and 120d of the movable member 120 corresponding to the connection block 112 are provided with mounting holes 122, the elastic member 140 is fixed to the side wall 120c or the side wall 120d and is located in the mounting hole 122, and the middle part of the elastic member 140 is fixed to the connection block 112, so when the movable member 120 moves, the elastic member 140 will be driven to deform. It is understandable that the elastic member 140 can also be installed on the side walls 120e and 120f of the movable member 120.

[0068] In the present invention, the two elastic members 140 have the same structure, and the specific structure of one of them is described in detail below. Figure 15As shown, the elastic member 140 includes a first connecting portion 141 and a second connecting portion 142 that are spaced apart from each other, and at least one elastic arm 143 connected between the two. Each elastic arm 143 can be deformed along the X-axis, Y-axis, and Z-axis. One of the first connecting portion 141 and the second connecting portion 142 is fixed to the movable member 120, and the other of the first connecting portion 141 and the second connecting portion 142 is fixed to the aforementioned connecting block 112. When the movable member 120 moves in any direction, the elastic arm 143 can be deformed, and the elastic member 140 is used to enhance the reset ability of the movable member 120.

[0069] More specifically, the first connecting portion 141 has an annular structure, the second connecting portion 142 is disposed in the middle of the first connecting portion 141, and two elastic arms 143 are symmetrically connected between the first connecting portion 141 and the second connecting portion 142. Among them, the second connecting portion 142 is fixed to the connecting block 112 of the fixing member 110, and the first connecting portion 141 is connected to the movable member 120. When the movable member 120 moves in any direction, it will drive the elastic arm 143 to deform, and the elastic force generated by the elastic arm 143 to recover the deformation is used to drive the movable member 120 to reset.

[0070] Continue to refer to Figure 15 As shown, each elastic arm 143 includes at least one first elastic branch arm 1431 and two second elastic branch arms 1432. The first elastic branch arm 1431 is spaced apart from the first connecting portion 141 and the second connecting portion 142 and extends in the vertical direction (Z-axis direction). The two second elastic branch arms 1432 both extend in the Y-axis direction and are connected to both ends of the first elastic branch arm 1431. The first elastic branch arm 1431 is connected to the first connecting portion 141 and the second connecting portion 142 through the two second elastic branch arms 1432.

[0071] In a specific manner, each elastic arm 143 includes three first elastic branch arms 1431. The three first elastic branch arms 1431 all extend in the vertical direction (Z-axis direction) and are spaced apart from each other, and the three first elastic branch arms 1431 are connected end to end in sequence to form a curved or bent shape; the two second elastic branch arms 1432 are respectively connected to the ends of the first elastic branch arm 1431 and protrude in opposite directions, and the two second elastic branch arms 1432 are respectively connected to the first connecting portion 141 and the second connecting portion 142. It can be understood that the shape of the elastic arm 143 is not limited to that in this embodiment.

[0072] Next, in conjunction with Figures 1 - 4 、 Figure 16 As shown, the structure of the flexible circuit board 300 in the present invention will be described in detail.

[0073] Refer to Figure 16As shown, the flexible circuit board 300 includes a first side plate 310, a second side plate 320, a third side plate 330, and a fourth side plate 340 that are sequentially connected and bent. Among them, the first side plate 310 and the third side plate 330 are arranged in parallel, the second side plate 320 and the fourth side plate 340 are arranged in parallel, and the length of the fourth side plate 340 is shorter than that of the third side plate 330. A receiving space corresponding to the outer wall shape of the movable member 120 is defined among the first side plate 310, the second side plate 320, the third side plate 330, and the fourth side plate 340. In this embodiment, the lengths of the first side plate 310, the second side plate 320, and the third side plate 330 all correspond to the three side walls of the movable member 120, and the heights of the first side plate 310, the second side plate 320, the third side plate 330, and the fourth side plate 340 correspond to the height of the movable member 120. In addition, the flexible circuit board 300 further includes a bottom plate 350. The bottom plate 350 is connected to the bottom of the fourth side plate 340, and its extending direction is the same as that of the first side plate 310 and the third side plate 330. Here, the same extending direction means that the length directions of the three all extend in the X-axis direction. At the same time, the length of the bottom plate 350 is greater than the lengths of the first side plate 310 and the third side plate 330. Therefore, the bottom plate 350 protrudes outside the second side plate 320 after passing through the bottom of the receiving space, as Figure 2 , Figure 16 shown. When the flexible circuit board 300 is installed with the movable member 120, the movable member 120 is received in the receiving space, and the side wall 120c of the movable member 120 is connected to the first side plate 310, as Figure 2 shown. At the same time, the image sensor 200 is fixed to the outside of the first side plate 310, as Figure 1 shown. In the present invention, this folding structure of the flexible circuit board 300 makes the translational stiffness and rotational stiffness of the flexible circuit board 300 in three axes very small, which is beneficial to the movement of the movable member 120. Of course, the relative positions between the flexible circuit board 300 and the movable member 120 are not limited to those in this embodiment.

[0074] Next, with reference to Figures 1 - 16 shown again, the working principle of the camera module 1 with anti-shake and focusing functions and its three-axis translation motor 100 of the present invention will be described.

[0075] When the detection element of the camera module 1 or the electronic device detects a slight shake of the lens assembly, the shake can be decomposed into displacement components in three directions of X, Y, and Z in the three-dimensional space. The detection element transmits the shake signal to the microprocessor to calculate the displacement amount that the image sensor 200 needs to compensate, and then controls the three-axis translation motor 100 to act to drive the image sensor 200 to move for compensation. Specifically as follows:

[0076] After the microprocessor calculates the displacement amount that the image sensor 200 needs to move in the positive X-axis direction, it controls the operation of the driving mechanism 130 provided on the side surface 110e of the fixing member 110. When the driving member 131 (SMA wire) of the driving mechanism 130 is energized and contracts, it will pull the first ends and the second ends of the two driving arms 132 to move in the positive X-axis direction, causing the deformation portions 1322 of the two driving arms 132 to deform, and causing the pushing blocks 133 on the first ends and the second ends of the two driving arms 132 to push against the movable member 120, so that the movable member 120 drives the image sensor 200 to move in the positive X-axis direction. See Figure 16 , Figures 12 - 13 as shown, thereby realizing the anti-shake function.

[0077] During the process of the movable member 120 moving in the positive X-axis direction, it will drive both of the two elastic members 140 to deform. Therefore, when the movable member 120 moves in place in the positive X-axis direction, the SMA wire is powered off to make it loose. First, the deformation portions 1322 of the two driving arms 132 can recover their deformation and drive the two driving portions 1323 to move and reset in the negative X-axis direction. Second, the elastic force of the elastic member 140 will also drive the movable member 120 to move and reset in the negative X-axis direction, so that the two driving portions 1323 can quickly disengage from the movable member 120 and reset.

[0078] Correspondingly, when the image sensor 200 needs to move in the negative X-axis direction, the driving mechanism 130 on the side surface 110f of the fixing member 110 is controlled to operate, and the driving mechanism 130 is used to push the movable member 120 to move in the negative X-axis direction, and the movable member 120 is used to drive the image sensor 200 to move in the negative X-axis direction, also realizing the anti-shake function. During reset, similarly, the deformation portions 1322 of the two driving arms 132 recover their deformation and the elastic member 140 recovers its deformation to drive the two driving portions 1323 to move and reset in the positive X-axis direction, realizing the quick reset of the movable member 120.

[0079] Similarly, when the microprocessor calculates that the image sensor 200 needs to move in the positive Y-axis direction, the driving mechanism 130 on the side surface 110c of the fixing member 110 is controlled to operate, so that it pushes the movable member 120 to move in the positive Y-axis direction, thereby driving the image sensor 200 to move in the positive Y-axis direction; correspondingly, by controlling the driving mechanism 130 on the side surface 110d to operate to push the movable member 120 to move in the negative Y-axis direction, thereby driving the image sensor 200 to move in the negative Y-axis direction. The image sensor 200 reciprocates in the Y-axis direction to realize the autofocus function. The reset method of the movable member 120 after moving in the Y-axis direction is the same as the above method.

[0080] Similarly, when the microprocessor calculates that the image sensor 200 needs to move in the positive Z-axis direction, the drive mechanism 130 on the top surface 110a of the fixing member 110 is controlled to operate, so as to push the movable member 120 to move in the positive Z-axis direction, thereby driving the image sensor 200 to move in the positive Z-axis direction; correspondingly, by controlling the drive mechanism 130 on the bottom surface 110b to operate to push the movable member 120 to move in the negative Z-axis direction, thereby driving the image sensor 200 to move in the negative Z-axis direction. The image sensor 200 moves reciprocally along the Z-axis to achieve the anti-shake function. The reset mode of the movable member 120 after moving along the Z-axis is the same as the above mode.

[0081] In summary, due to the camera module 1 with anti-shake and focusing functions of the present invention, its three-axis translation motor 100 includes a fixing member 110, a movable member 120 and at least three drive mechanisms 130. The movable member 120 is movably arranged outside the fixing member 110 and is used to mount the image sensor 200 or the camera assembly. Each drive mechanism 130 is respectively installed on at least three side surfaces of the fixing member 110 and is respectively used to drive the movable member 120 to move along the X-axis, Y-axis or Z-axis. By moving the movable member 120 in three directions, the image sensor 200 or the camera assembly is driven to move synchronously along the X-axis, Y-axis or Z-axis, thereby realizing the anti-shake function and the autofocus function of the image sensor 200 or the camera assembly. That is, by using one three-axis translation motor 100, the camera module 1 can simultaneously realize the focusing function and the anti-shake function. Compared with the prior art, the number of drivers is reduced, thereby simplifying the overall structure of the camera module 1, making the space occupied by the camera module 1 smaller, being beneficial to the miniaturization of the overall structure of the camera module 1, and reducing the assembly difficulty of the camera module 1. At the same time, the production cost of the camera module 1 is also reduced.

[0082] The above-disclosed are only the preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, the equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A camera module with anti-shake and focusing functions, characterized in that, It includes a camera module, an image sensor, a flexible circuit board, and a three-axis translation motor. Among them, the three-axis translation motor includes a fixed part, a movable part, and at least three driving mechanisms. The camera module or the image sensor is fixed to the outside of the movable part. The flexible circuit board is fixed to the outside of the movable part and is electrically connected to the camera module or the image sensor. Each of the driving mechanisms is respectively installed on at least three sides of the fixed part, and each of the driving mechanisms is respectively used to drive the movable part to translate along the X-axis, Y-axis, or Z-axis. When the movable part moves, it drives the image sensor or the camera module to translate synchronously; The three-axis translation motor further includes at least one elastic member. The elastic member is respectively connected to the movable part and the fixed part. The elastic member can be deformed along the X-axis, Y-axis, or Z-axis respectively. When any one of the driving mechanisms drives the movable part to move, the elastic member can be deformed. When the elastic member recovers from deformation, it drives the movable part to reset. The elastic member includes a first connecting part, a second connecting part arranged at intervals, and at least one elastic arm connected between the two. The first connecting part has an annular structure. The second connecting part is arranged in the middle of the first connecting part. One of the first connecting part and the second connecting part is fixed to the movable part, and the other is connected to the fixed part. When the movable part moves in any direction, the elastic arm can be deformed along the X-axis, Y-axis, or Z-axis. And each elastic arm includes at least one first elastic branch arm and two second elastic branch arms. The first elastic branch arm is spaced from the first connecting part and the second connecting part and extends vertically. The two second elastic branch arms both extend in the Y-axis direction and are connected to both ends of the first elastic branch arm. The first elastic branch arm is connected to the first connecting part and the second connecting part through the two second elastic branch arms; There are four sides between the top surface and the bottom surface of the fixed part. Connecting blocks protrude on two opposite sides. The side surface of the connecting block is in an I-shaped structure, and the two connecting blocks on the two opposite sides protrude in opposite directions. The connecting block is used to install the elastic member.

2. The camera module with anti-shake and focusing functions as described in claim 1, wherein The number of the driving mechanisms is three or six. Three driving mechanisms are respectively installed on three sides of the fixed part, and the movable part is respectively driven to translate along the X-axis, Y-axis, or Z-axis through the three driving mechanisms. Six driving mechanisms are respectively installed on six sides of the fixed part, and are symmetrically arranged in pairs along the X-axis, Y-axis, or Z-axis. The movable part is driven to move along the X-axis, Y-axis, or Z-axis respectively through the six driving mechanisms.

3. The camera module with anti-shake and focusing functions according to any one of claims 1-2, characterized in that, Each of the driving mechanisms includes: A driving arm. The driving arm includes a fixed part, a deformation part, and a driving part arranged in sequence. The fixed part is fixed to the fixed part, and the deformation part can produce elastic deformation; A driving member. The driving member is connected to the driving part. When the driving member applies force to the driving part, the deformation part can be deformed, so that the driving part generates displacement and acts on the movable part to push the movable part to move.

4. The camera module with an anti-shake and focusing function according to claim 3, characterized in that, The thickness of the deformation part is less than the thickness of the driving part.

5. The camera module with anti-shake and focusing functions as described in claim 3, wherein The driving member is an SMA wire, one end of the SMA wire is connected to the driving part, when the SMA wire is energized and shrinks, it can apply a force to the driving part, thereby causing the deformation part to deform, and when the SMA wire is de-energized and relaxed, the deformation part can restore its deformation.

6. The camera module with anti-shake and focusing functions according to claim 3, characterized in that, Each of the driving mechanisms further includes a pushing block, and the pushing block is connected to the driving part and detachably abuts against the movable part.

7. The camera module with anti-shake and focusing functions according to any one of claims 1-2, characterized in that, The three-axis translation motor further includes an outer housing, the fixing member and the movable member are both accommodated in the outer housing, and a fixing block protrudes from the fixing member, a through hole corresponding to the fixing block is formed in the movable member, and the fixing block passes through the through hole and is fixed to the inner wall of the outer housing, so that the movable member is movably accommodated between the outer housing and the fixing member.

8. The camera module with anti-shake and focusing functions according to any one of claims 1-2, characterized in that, The flexible circuit board includes a plurality of side plates that are sequentially connected and bent relative to each other and a bottom plate connected to the bottom of one of the side plates. A receiving space is defined between the plurality of side plates and the bottom plate, and the movable member is accommodated in the receiving space and connected to one of the side plates.

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